Bug fix #3818 After "Rename table ... to ..." left menu doesn't reflect changes

The left navigationa and the other places where the old table name was
showing up, now updates if the table is renamed.
Contest-2 Variable Name Fix

Changed the variable name from ajax_reload_nav to ajax_reload
Cosmetic changes
Applied PMA_Util::unQuote to table name extracted from the RENAME command
Merge pull request #184 from ayushchd/Contest-2

Contest-2: Bug fix #3818 After "Rename table ... to ..." left menu doesn't reflect ...